That's so cool! i love conversations like that. What a great little thinker you have. Of course, i would have said "why can't we all just get along - of course 0 is a friend." smile

dazey - we just got The Cat in Numberland from the library based on your suggestion too. DS4 loved it. We also got G is for Googol, but haven't started that yet, since DS thinks all books must be read through in one sitting, and a glance at this one tells me it is not your average alphabet book. smile